50 is not old to me or most bikers that i know.running maybe cuz of the pounding you take on the joints.at 50 i bet you can still probably kick the snot out of the majority of trail riders with the same experience including me.ive been riding for 10 years or so on the trails and find that experience makes up for youth very often.
YOU KNOW THAT YOU ARE OVER THE HILL WHEN YOUR MIND MAKES A PROMISE THAT YOUR BODY CANT FILL-OLD FOLKS BOOGIE ,BY LITTLE FEAT :thumbup: